Mercedes-Benz A 220 2017–2022 — technical service bulletin
Bulletin LI05.10-P-075373 · NHTSA communication 10225807 · issued Oct 1, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2022
model years
17
vehicle entries
Official summary
Complaint Chirping or tapping noise originating in area of front crankshaft pulley when engine cold. Noise may lessen as engine reaches operating temperature. Attachments File Description M260 noise.mp4 Noise example Cause Harmonics from timing chain drive. Remedy Replace timing chain tensioner with part A2600502000. Note: This noise will not cause damage to the engine or other symptoms. The chain tensioner should only be replaced in the event of a customer complaint.
Vehicles covered
- 2019 Mercedes-Benz A 220
- 2020 Mercedes-Benz A 220
- 2021 Mercedes-Benz A 220
- 2022 Mercedes-Benz A 220
- 2020 Mercedes-Benz AMG A35
- 2021 Mercedes-Benz AMG A35
- 2020 Mercedes-Benz AMG CLA35
- 2021 Mercedes-Benz AMG CLA35
- 2022 Mercedes-Benz AMG CLA35
- 2017 Mercedes-Benz AMG GLA35
- 2019 Mercedes-Benz CLA 250
- 2020 Mercedes-Benz CLA 250
- 2021 Mercedes-Benz CLA 250
- 2022 Mercedes-Benz CLA 250
- 2020 Mercedes-Benz GLA 250
- 2021 Mercedes-Benz GLA 250
- 2022 Mercedes-Benz GLA 250
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.